A tanker originally intended for use as Mobile Floating Storage, Gardoqui departed Pearl Harbor for Eniwetok 27 July 1945. Reaching her destination 12 August, she discharged her cargo of fuel and lube oil to navy and merchant ships for almost a month. Gardoqui departed Eniwetok 7 September and put in at Tokyo on 21 September to discharge more lube and fuel oil.
Departing Tokyo 7 November, she transited the Panama Canal via Pearl Harbor 28 December and came to anchor off Mobile, Alabama, on 6 January 1946. Gardoqui decommissioned at Mobile 13 February 1946 and was returned to the War Shipping Administration. Her name was struck from the Naval Vessel Register on 12 April 1946 and she was sold to her previous owner, E. T. Bedford, 28 January 1947 and scrapped later that year.